Ishii, K., Hoesch, M., Inami, T., Kuzushita, K., Ohwada, K., Tsubota, M., ...
We report a Cu K-edge resonant inelastic x-ray scattering (RIXS) study of high-Tc cuprates. Momentum-resolved charge excitations in the CuO2 plane are examined from parent Mott insulators to...
Ishii, K., Tsutsui, K., Tohyama, T., Inami, T., Mizuki, J., Murakami, Y., ...
Momentum dependent charge excitations of a two-leg ladder are investigated by resonant inelastic x-ray scattering of (La,Sr,Ca)14Cu24O41. In contrast to the case of a square lattice, momentum...
Oxygen Phonon Branches in Detwinned YBa2Cu3O7 (2007)
Reznik, D., Pintschovius, L., Reichardt, W., Endoh, Y., Hiraka, H., Tranquada, J. M., ...
We report results of inelastic neutron scattering measurements of phonon dispersions on a detwinned sample of YBaCu3O7 and compare them with model calculations. Plane oxygen bond stretching phonon...
Local moment fluctuations in an optimally-doped high Tc superconductor (2006)
Reznik, D., Eremin, I., Pintschovius, L., Arai, M., Endoh, Y., ...
We present results of neutron scattering experiments on YBa2Cu3O6.95 (Tc=93K). Our results indicate that magnetic collective modes due to correlated local moments are present both above and below Tc...
Spin Gap in Optimally-doped YBCO (2006)
Reznik, D., Pintschovius, L., Endoh, Y., Bourges, P., Sidis, Y., Masui, T., ...
Spin gap in optimally-doped YBCO was investigated by inelastic neutron scattering. We found that q-integrated spectral weight in the vicinity of the spin gap has a shape of a step function at 10K...
Ishii, K., Tsutsui, K., Endoh, Y., Tohyama, T., Maekawa, S., Hoesch, M., ...
We report a resonant inelastic x-ray scattering (RIXS) study of charge excitations in the electron-doped high-Tc superconductor Nd1.85Ce0.15CuO4. The intraband and interband excitations across the...
Mott gap excitations in twin-free YBa2Cu3O7-d (Tc = 93 K) studied by RIXS (2004)
Ishii, K., Tsutsui, K., Endoh, Y., Tohyama, T., Kuzushita, K., Inami, T., ...
Mott gap excitations in the high-Tc superconductor of the optimal doped YBa2Cu3O7-d (Tc = 93 K) have been studied by the resonant inelastic x-ray scattering method. Anisotropic spectra in the...
Ishii, K., Inami, T., Ohwada, K., Kuzushita, K., Mizuki, J., Murakami, Y., ...
Electronic excitations near the Fermi energy in the hole doped manganese oxides (La1-xSrxMnO3, x=0.2 and 0.4) have been elucidated by using the resonant inelastic x-ray scattering (RIXS) method. A...
Softening of Cu-O bond stretching phonon in tetragonal HgBa$_2$CuO$_{4+\delta}$ (2004)
Uchiyama, H., Baron, A. Q. R., Tsutsui, S., Tanaka, Y., Yamamoto, A., ...
Phonons in nearly optimally doped HgBa$_2$CuO$_{4+\delta}$ were studied by inelastic X-ray scattering. The dispersion of the low energy modes is well described by a shell model, while the Cu-O bond...
Spin Dynamics in High-Tc Superconductor YBa2Cu3O6.9 (2004)
Yokoo, T, Arai, M, Frost, C D, Endoh, Y, Egami, T, Shiohara, Y, ...
Spin Dynamics in High-Tc Superconductor Yba2Cu3O6.9 (2004)
Yokoo, T, Arai, M, Frost, C D, Endoh, Y, Egami, T, Shiohara, Y, ...
Oxygen Phonon Branches in YBa2Cu3O7 (2003)
Pintschovius, L., Reznik, D., Reichardt, W., Endoh, Y., Hiraka, H., Tranquada, J. M., ...
We report results of inelastic neutron scattering measurements of phonon dispersions in optimally doped YBa2Cu3O6.95 and compare them with model calculations. The focus is on the in-plane oxygen...
Evidence for Dynamic Charge Stripes in the Phonons of Optimally Doped YBCO (2003)
Pintschovius, L., Endoh, Y., Reznik, D., Hiraka, H., Tranquada, J. M., Reichardt, W., ...
Inelastic neutron scattering investigations on optimally doped YBCO revealed a very pronounced temperature dependence in the Cu-O in-plane bond-stretching vibrations along the (010) direction: a...
Dispersion of Magnetic Excitations in Superconducting Optimally Doped YBa_2Cu_3O_6.95 (2003)
Reznik, D., Bourges, P., Pintschovius, L., Endoh, Y., Sidis, Y., Matsui, T., ...
Detailed neutron scattering measurements of YBa_2Cu_3O_6.95 found that the resonance peak and incommensurate magnetic scattering induced by superconductivity represent the same physical phenomenon:...
Incommensurate dynamical properties of optimally doped YBa2Cu3O6.9 (2003)
Yokoo, T, Arai, M, Shiohara, Y, Tajima, S, Frost, C D, Endoh, Y
Magnetic excitations in the spin-glass phase of La2-xSrxCuO4 (2003)
Goka, H, Kuroshima, S, Fujita, M, Yamada, K, Hiraka, H, Endoh, Y, ...
Incommensurate Properties of high-Tc Superconductor YBa2Cu3O6.93 (2003)
Yokoo, T, Arai, M, Shiohara, Y, Tajima, S, Frost, C D, Endoh, Y
Mibu, K, Takeda, M, Suzuki, J, Nakanishi, A, Kobayashi, T, Endoh, Y, ...
Yamada, K., Kurahashi, K., Uefuji, T., Fujita, M., Park, S., ...
We report neutron scattering studies on single crystals of the electron-doped (n-type) superconducting cuprate Nd2-xCexCuO4 (x=0.15) with Tc = 18 K and 25 K. Unlike the hole-doped (p-type)...
Spin Pseudo Gap in La2-xSrxCuO4 Studied by Neutron Scattering (2002)
Lee, C. H., Yamada, K., Hiraka, H., Rao, C. R. Venkateswara, Endoh, Y.
Spin excitations of La2-xSrxCuO have been studied using inelastic neutron scattering techniques in the energy range of 2 meV =< w =< 12 meV and the temperature range of 8 K =< T =< 150 K. We observed...
Oxygen Phonon Branches in Detwinned YBa2Cu3O7 (2002)
Reznik, D., Pintschovius, L., Reichardt, W., Endoh, Y., Hiraka, H., Tranquada, J. M., ...
We report results of inelastic neutron scattering measurements of phonon dispersions on a detwinned sample of YBaCu3O7 and compare them with model calculations. Plane oxygen bond stretching phonon...
Magnetic field effects and magnetic anisotropy in lightly doped La_{2-x}Sr_xCuO_4 (2002)
Matsuda, M., Fujita, M., Yamada, K., Birgeneau, R. J., Endoh, Y., Shirane, G.
The effects of the application of a magnetic field on the diagonal stripe spin-glass phase is studied in lightly doped La_{2-x}Sr_xCuO_4 (x=0.014 and 0.024). With increasing magnetic field, the...
New Magnetic Excitations in the Spin-Density-Wave of Chromium (2002)
Hiraka, H., Boni, P., Endoh, Y., Fujita, M., Yamada, K., Shirane, G.
Low-energy magnetic excitations of chromium have been reinvestigated with a single-Q crystal using neutron scattering technique. In the transverse spin-density-wave phase a new type of well-defined...
Roessli, B., Böni, P., Fischer, W. E., Endoh, Y.
Using polarized inelastic neutron scattering the antisymmetric part of the dynamical susceptibility in non-centrosymmetric MnSi is determined. The paramagnetic fluctuations are found to be...
Chiral fluctuations in MnSi above Tc (2002)
Roessli, B., Boeni, P., Fischer, W. E., Endoh, Y.
Polarized neutrons are used to determine the antisymmetric part of the magnetic susceptibility in non-centrosymmetric MnSi. The paramagnetic fluctuations are found to be incommensurate with the...
Electronic phase separation in lightly-doped La$_{2-x}$Sr$_x$CuO$_4$ (2001)
Matsuda, M., Fujita, M., Yamada, K., Birgeneau, R. J., Endoh, Y., Shirane, G.
The hole concentration dependence of the magnetic correlations is studied in very lightly-doped La$_{2-x}$Sr$_x$CuO$_4$ ($x
Inami, T., Ishihara, S., Kondo, H., Mizuki, J., Fukuda, T., Maekawa, S., ...
We report resonant inelastic x-ray scattering experiments of the orbital ordered manganite LaMnO3. When the incident photon energy is tuned near the Mn K absorption edge, the spectra reveal three...
Highly Degenerate Canted Spin Structure in Bilayer Manganite La$_{1.1}$Sr$_{1.9}$Mn$_2$O$_7$ (2001)
Kubota, M., Oohara, Y., Yoshizawa, H., Fujioka, H., Hirota, K., Moritomo, Y., ...
We have examined magnetic ordering of the two-dimensional (2D) bilayer manganite La$_{1.1}$Sr$_{1.9}$Mn$_2$O$_7$ with neutron diffraction technique. Due to the two-dimensionality, there appears...
Anisotropy in the electronic screening of oxygen lattice modes in YBa(2)Cu(3)O(6.95) (2001)
McQueeney, R. J., Egami, T., Petrov, Y., Yethiraj, M., Arai, M., ...
Inelastic neutron scattering data from a twinned single-crystal of YBa2Cu3O6.95 are presented that show a distinct a-b plane anisotropy in the oxygen vibrations. The Cu-O bond-stretching type phonons...
Hirota, K., Ishihara, S., Fujioka, H., Kubota, M., Yoshizawa, H., Moritomo, Y., ...
Low-temperature spin dynamics of the double-layered perovskite La_2-2x_Sr_1+2x_Mn_2_O_7 (LSMO327) was systematically studied in a wide hole concentration range (0.3
Magnetic frustrations in the face centered cubic antiferromagnet NiS2 (2001)
Matsuura, M., Endoh, Y., Hiraka, H., Yamada, K., Hirota, K., Mishchenko, A. S., ...
Neutron scattering experiment on NiS2 single crystal revealed a honeycomb pattern of the intensity distribution in reciprocal lattice space (continuous-line structure along the fcc zone boundary)...
Spin Fluctuations in the Underdoped High-Tc Cuprate La1.93Sr0.07CuO4 (2001)
Hiraka, H., Endoh, Y., Fujita, M., Lee, Y. S., Kulda, J., Ivanov, A., ...
We performed magnetic inelastic neutron-scattering experiments on La(1.93)Sr(0.07)CuO(4) over a wide range of E and T;2 < E < 44 meV and 1.5 < T < 300 K. The dynamic susceptibility X"(q,E) of this...
Koike, Y, Akoshima, M, Aoyama, M, Nishimaki, K, Kawamata, T, Adachi, T, ...
Possible stripe ordering at x=0.21 in La2-xSrxCu1-yZnyO4 (2001)
Koike, Y, Aoyama, M, Adachi, T, Akoshima, M, Kawamata, T, Watanabe, I, ...
Local lattice distortion and charge-spin stripe structure of superconducting YBa2Cu3O6+x (2001)
Arai, M, Endoh, Y, Tajima, S, Bennington, S M
Physics in local lattice distortions, Eds H Oyanagi, A Bianconi (American Institute of Physics) (2001)
Observation of the antiferroquadrupolar order in DyB2C2 by resonant x-ray scattering (2000)
Matsumura, T., Oumi, N., Hirota, K., Nakao, H., Murakami, Y., Wakabayashi, Y., ...
We have investigated the antiferroquadrupolar(AFQ) order in DyB$_2$C$_2$ by resonant x-ray scattering. X-rays with energies near the $L_3$ absorption edge of Dy were employed. Superlattice peaks that...
Cox, D. E., Iglesias, T., Moshopoulou, E., Hirota, K., Takahashi, K., Endoh, Y.
The structural phase diagram of the La1-xSrxMnO3 system in the compositional range 0.08
Magnetic Phase Diagram and Metal-Insulator Transition of NiS2-xSex (2000)
Matsuura, M., Hiraka, H., Yamada, K., Endoh, Y.
Magnetic phase diagram of NiS2-xSex has been reexamined by systematic studies of electrical resistivity, uniform magnetic susceptibility and neutron diffraction using single crystals grown by a...
Kubota, M., Oohara, Y., Yoshizawa, H., Fujioka, H., Shimizu, K., Hirota, K., ...
The charge ordering in the bilayer manganite system La$_{2-2x}$Sr$_{1+2x}$Mn$_{2}$O$_{7}$ with $0.30 \le x \le 0.50$ has been studied by neutron diffraction. The charge order is characterized by the...
Matsuda, M., Fujita, M., Yamada, K., Birgeneau, R. J., Kastner, M. A., Hiraka, H., ...
Neutron scattering experiments reveal that a diagonal spin modulation, which is a one-dimensional modulation rotated away by 45$^\circ$ from that in the superconducting phase, occurs universally...
Dynamical magnetic susceptibility in the optimum doped LSCO with Tc= 37K (2000)
Endoh, Y, Fukuda, T, Wakimoto, S, Arai, M, Yamada, K, Bennington, S M
Incommensurate Geometry of the Elastic Magnetic Peaks in Superconducting La1.88Sr0.12CuO4 (1999)
Kimura, H., Matsushita, H., Hirota, K., Endoh, Y., Yamada, K., Shirane, G., ...
We report magnetic neutron scattering measurements of incommensurate magnetic order in a superconducting single crystal of La1.88Sr0.12CuO4. We find that the incommensurate wavevectors which describe...
Incommensurate Spin Dynamics in High Temperature Superconductor of Optimally Doped YBa2Cu3O7 (1999)
Arai, M., Nishijima, T., Endoh, Y., Garrett, A. W., Tajima, S., Tomimoto, K., ...
The spin dynamics of an optimally doped YBa2Cu3O7 (Tc = 93 K) crystal array have been investigated in a wide range of momentum and energy (Q - E) space using the time-of-flight neutron scattering...
Wakimoto, S., Ueki, S., Endoh, Y., Yamada, K.
Systematic measurements of the magnetic susceptibility were performed on single crystals of lightly doped La2-xSrxCuO4 (x=0.03, 0.04 and 0.05). For all samples the temperature dependence of the...
Hirota, K., Oumi, N., Matsumura, T., Nakao, H., Wakabayashi, Y., Murakami, Y., ...
Antiferroquadrupolar (AFQ) ordering has been conjectured in several rare-earth compounds to explain their anomalous magnetic properties. No direct evidences for AFQ ordering, however, have been...
Direct Observation of a One Dimensional Static Spin Modulation in Insulating La1.95Sr0.05CuO4 (1999)
Wakimoto, S., Birgeneau, R. J., Kastner, M. A., Lee, Y. S., Erwin, R., Gehring, P. M., ...
We report the results of an extensive elastic neutron scattering study of the incommensurate (IC) static spin correlations in La1.95Sr0.05CuO4 which is an insulating spin glass at low temperatures....
Freezing of anisotropic spin clusters in La1.98Sr0.02CuO4 (1999)
Matsuda, M., Lee, Y. S., Greven, M., Kastner, M. A., Birgeneau, R. J., Yamada, K., ...
A spin-glass compound, La$_{1.98}$Sr$_{0.02}$CuO$_4$, shows quasi-three-dimensional magnetic ordering below $\sim$40 K. A remarkable feature is that the magnetic correlation length along the...
Two ferromagnetic phases in La1-xSrxMnO3(x ~1/8) (1999)
Nojiri, H., Kaneko, K., Motokawa, M., Hirota, K., Takahashi, K., Endoh, Y.
It was discovered in La1-xSrxMnO3(x~1/8) that a field induced phase transition occurs from a ferromagnetic metal(FM) phase to a ferromagnetic insulator (FI) phase. The magnetization shows a sharp...
Instantaneous Spin Correlations in La2CuO4 (1999)
Birgeneau, R. J., Greven, M., Kastner, M. A., Lee, Y. S., Wells, B. O., Endoh, Y., ...
We have carried out a neutron scattering study of the instantaneous spin-spin correlations in La2CuO4 (T_N = 325 K) over the temperature range 337 K to 824 K. Incident neutron energies varying from...
Neutron Scattering Study of Elastic Magnetic Signals in Superconducting La1.94Sr0.06Cu4 (1999)
Wakimoto, S., Yamada, K., Ueki, S., Shirane, G., Lee, Y. S., Lee, S. H., ...
Recent neutron-scattering experiments on La(2-x)Sr(x)CuO4 single crystals by Wakimoto et al. have revealed that elastic magnetic peaks appear at low temperatures in both insulating (x=0.02-0.05) and...
Kubota, M., Fujioka, H., Hirota, K., Ohoyama, K., Moritomo, Y., Yoshizawa, H., ...
Comprehensive neutron-powder diffraction and Rietveld analyses were carried out to clarify the relation between the crystal and magnetic structures of La2-2xSr1+2xMn2O7 (0.30 =< x =< 0.50). The...
Spin Dynamical Properties of the Layered Perovskite La1.2Sr1.8Mn2O7 (1999)
Fujioka, H., Kubota, M., Hirota, K., Yoshizawa, H., Moritomo, Y., Endoh, Y.
Inelastic neutron-scattering measurements were performed on a single crystal of the layered colossal magnetoresistance (CMR) material La1.2Sr1.8Mn2O7 (Tc ~ 120K). We found that the spin wave...
Quantum Monte Carlo Study of Weakly Coupled Spin Ladders (1999)
Kim, Y. J., Birgeneau, R. J., Kastner, M. A., Lee, Y. S., Endoh, Y., Shirane, G., ...
We report a quantum Monte Carlo study of the thermodynamic properties of arrays of spin ladders with various widths ($n$), coupled via a weak inter-ladder exchange coupling $\alpha J$, where $J$ is...
Wakimoto, S., Birgeneau, R. J., Endoh, Y., Gehring, P. M., Hirota, K., Kastner, M. A., ...
Neutron-scattering experiments have been performed on lightly-doped La(2-x)Sr(x)CuO4 single crystals in both the insulating (x=0.03,0.04,0.05) and superconducting (x=0.06) regions. Elastic magnetic...
Lee, Y. S., Birgeneau, R. J., Kastner, M. A., Endoh, Y., Wakimoto, S., Yamada, K., ...
We report neutron scattering measurements of spin density wave order within the superconducting state of a single crystal of predominately stage-4 La2CuO4+y with a Tc(onset) of 42 K. The low...
Kubota, M., Fujioka, H., Ohoyama, K., Hirota, K., Moritomo, Y., Yoshizawa, H., ...
Systematic powder diffraction studies have been carried out to establish the magnetic phase diagram of La_{2-2x}Sr_{1+2x}Mn_2O_7 (LSMO327) in a wide hall concentration range ($0.30 \leq x \leq...
Endoh, Y., Hirota, K., Ishihara, S., Okamoto, S., Murakami, Y., Nishizawa, A., ...
A lightly doped perovskite mangantite La_{0.88}Sr_{0.12}MnO_3 exhibits a phase transition at T_{OO}=145 K from a ferromagnetic metal (T_C=172 K) to a novel ferromagnetic insulator.We identify that...
Magnetic correlations in CsVCl3 (1999)
Itoh, S, Kakurai, K, Endoh, Y, Tanaka, H, Harris, M J, Nakajima, K